CVE-2023-54261 drm/amdkfd: Add missing gfx11 MQD manager callbacks

In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Add missing gfx11 MQD manager callbacks mqdstride function was introduced in commit 2f77b9a242a2 "drm/amdkfd: Update MQD management on multi XCC setup" but not assigned for gfx11. Fixes a NULL dereference in debugfs...